687822541 has 8 divisors (see below), whose sum is σ = 786248384. Its totient is φ = 589438080.

The previous prime is 687822497. The next prime is 687822557. The reversal of 687822541 is 145228786.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 687822541 - 2¹⁷ = 687691469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687826541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45106 + ... + 58396.

It is an arithmetic number, because the mean of its divisors is an integer number (98281048).

Almost surely, 2^687822541 is an apocalyptic number.

It is an amenable number.

687822541 is a deficient number, since it is larger than the sum of its proper divisors (98425843).

687822541 is a wasteful number, since it uses less digits than its factorization.

687822541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20691.

The product of its digits is 215040, while the sum is 43.

The square root of 687822541 is about 26226.3710985718. The cubic root of 687822541 is about 882.7250843234.

The spelling of 687822541 in words is "six hundred eighty-seven million, eight hundred twenty-two thousand, five hundred forty-one".